Noah K. Murray /The Star LedgerKasia Rivera, seen during arraignment at Essex County Veteran's Court House today. Rivera is charged with manslaughter for the death of Justin Street, 22.

NEWARK — A 34-year-old woman pleaded not guilty to homicide charges today for allegedly administering a silicone injection into the penis of a 22-year-old man, who later died.

Kasia Rivera appeared in Superior Court in Newark this morning to answer charges of reckless manslaughter and unauthorized practice of medicine in the death of Justin Street. Rivera, who wore a black sweater over a purple shirt, stood silently in handcuffs as her public defender answered the judge's questions.

She was returned to jail, unable to the pay the $75,000 bail.

Street, a father of two young children, died in May, a day after he went to Rivera seeking an penis enlargement, authorities said.

The medical examiner determined the cause of death as silicone embolism as a result of the injection, the Essex County Prosecutor's office said. Instead of hitting the tissue, the silicone went directly into Street's bloodstream and he was taken to the hospital, where he died, said Assistant Prosecutor William Neafsey.

Courtesy of China StreetJustin Street

Authorities are trying to determine how and where Rivera obtained the silicone and whether she had administered the procedure before. Neafsey said she was not medically licensed, although it was unclear whether that procedure requires medical training.

Street's parents attended the court hearing today, and urged anyone who may have gotten similar procedures from Rivera to step forward. "I wouldn't recommend nobody to do it. You see what happens. It's a dangerous outcome," said his father, Kysung Mills.